CN112296764A - Surface roughness treatment method for front and rear shafts of new energy automobile - Google Patents
Surface roughness treatment method for front and rear shafts of new energy automobile Download PDFInfo
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- CN112296764A CN112296764A CN202010929402.5A CN202010929402A CN112296764A CN 112296764 A CN112296764 A CN 112296764A CN 202010929402 A CN202010929402 A CN 202010929402A CN 112296764 A CN112296764 A CN 112296764A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/102—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration with means for agitating the liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/0092—Grinding attachments for lathes or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
- C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
- C23C8/64—Carburising
- C23C8/66—Carburising of ferrous surfaces
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/12—Oxygen-containing compounds
- C23F11/124—Carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a method for processing the surface roughness of a front axle and a rear axle of a new energy automobile, which relates to the technical field of automobile transmission shaft roughness and comprises the following steps: s1, pre-cleaning; s2, carrying out rough grinding treatment; s3, carrying out secondary coarse grinding treatment; s4, shot blasting; s5, carburizing and strengthening; s6, fine grinding; and S7, anti-oxidation treatment. The roughness treatment method is a heat treatment process for heating and preserving heat of a steel part in a carburizing medium to enable carbon to permeate into a surface layer by performing carburizing and strengthening treatment, and not only can effectively polish the roughness of the outer surface of a transmission shaft, but also can well strengthen the working strength of the transmission shaft by performing the carburizing and strengthening treatment, and simultaneously can well strengthen the oxidation resistance of the transmission shaft, so that the transmission shaft is prevented from being oxidized again to cause the surface of the transmission shaft to rust.
Description
Technical Field
The invention relates to the technical field of automobile transmission shaft roughness, in particular to a method for processing the surface roughness of a front axle and a rear axle of a new energy automobile.
Background
The transmission shaft is a shaft capable of transmitting power in the transmission shaft of a universal transmission device, and is a rotating body with high rotating speed and few supports, so the dynamic balance of the transmission shaft is crucial, the transmission shaft is generally subjected to a dynamic balance test before leaving a factory and is adjusted on a balancing machine, for a front engine rear wheel driven vehicle, the rotation of a transmission is transmitted to a shaft of a main speed reducer, the transmission shaft can be provided with a plurality of joints, the joints can be connected through universal joints, and the outer surface of the transmission shaft needs to be subjected to rough grinding treatment in the machining process.
When the existing treatment method is used for carrying out roughness treatment on the transmission shaft, after polishing treatment is finished, secondary strengthening treatment is not carried out on the outer surface of the transmission shaft, and meanwhile, anti-oxidation treatment is not carried out on the outer surface of the transmission shaft, so that the anti-oxidation capability of the transmission shaft is effectively enhanced, and the using effect of the transmission shaft is effectively enhanced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a surface roughness treatment method for the front and rear shafts of a new energy automobile, which solves the problems that after polishing treatment is finished, secondary reinforcement treatment is not carried out on the outer surface of a transmission shaft, and meanwhile, anti-oxidation treatment is not carried out on the outer surface of the transmission shaft, so that the anti-oxidation capability of the transmission shaft is effectively enhanced, and the using effect of the transmission shaft is effectively enhanced.
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for processing the surface roughness of the front and rear shafts of a new energy automobile comprises the following steps:
s1, pre-cleaning treatment: preparing a cleaning pool in advance, injecting a proper amount of hydrochloric acid into the cleaning pool, placing a transmission shaft to be processed and polished into the cleaning pool, stirring the transmission shaft by using an external stirring device for a specified time, cleaning and stirring, cleaning the hydrochloric acid on the outer surface of the transmission shaft by using cleaning after the cleaning and stirring are finished, and drying;
s2, rough grinding treatment: one end of a transmission shaft is coaxially clamped on a power output mechanism of a lathe, a polishing device in the lathe is adopted to perform rough polishing on the annular outer surface of the transmission shaft, the polishing is stopped when the raw material of the transmission shaft is processed to the state that the diameter and the length of the raw material of the transmission shaft both have 1mm of processing allowance, and then the transmission shaft is taken down from a clamp of the power output mechanism of the lathe and one end of the transmission shaft is replaced to perform the same processing step for processing;
s3, secondary coarse grinding treatment: grinding the end part of the shaft neck for the second time, wherein the cutting step is the same as the step S2, the ground diameter is the diameter of the addendum circle of the spline, the hobbing grinding processing is carried out on the spline part through a hobbing machine, so that the spline is ground, and the same step is carried out by taking down the transmission shaft from a clamp of a lathe power output mechanism and exchanging one end for the same processing step;
s4, shot blasting treatment: placing the processed transmission shaft into a designated fixture device for clamping and fixing, and after clamping is finished, performing shot blasting processing on the outer surface of the transmission shaft by using an external shot blasting machine, wherein the shot blasting amount is controlled in a designated interval;
s5, carburizing and strengthening treatment: putting the transmission shaft into an active carburizing medium, heating the transmission shaft to a single-phase austenite region at a specified temperature, and after the heat preservation is carried out for enough time, enabling activated carbon atoms decomposed from the carburizing medium to permeate into the surface layer of the steel part, so that the surface of the transmission shaft obtains high carbon on the surface layer, and the core part still maintains the original components;
s6, fine grinding treatment: cooling the heat-treated transmission shaft for a specified time, polishing the cooled spline shaft, wherein the polishing objects mainly comprise a shaft neck and a spline, so that the shaft neck and the spline meet the use requirements, and finishing the finish machining process of the spline shaft of the transmission shaft;
s7, anti-oxidation treatment: and pouring the prepared lactic acid with the content of a specified numerical value into a specified container, then putting the transmission shaft into the container, stirring the lactic acid by using an external stirring device for a specified time, taking out the antimony rod, airing, and packaging the transmission shaft.
Preferably, the content of the hydrochloric acid in the step S1 is controlled within a range of 35% -50%, the internal rotation speed of the stirring device is set at 400-500r/min, and the specified time duration is controlled at 5-10 min.
Preferably, the internal rotation speed of the grinding device in the step S2 is set to 350-.
Preferably, the rotation speed of the grinding device in the step S3 is set to be 150-.
Preferably, the internal rotation speed of the shot blasting machine in the step S4 is set at 350-600r/min, and the shot blasting amount of the shot blasting machine is controlled at 40-50 Kg/min.
Preferably, the specified temperature in the step S5 is controlled at 900-950 ℃, and the temperature is maintained for 1-1.5 h.
Preferably, the internal rotation speed of the grinding device in the step S6 is set at 600r/min and the cooling time is controlled at 30-40 min.
Preferably, the content of lactic acid in the step S7 is controlled to be 45% -55%, and the stirring rotation speed inside the stirring device is controlled to be 400-600 r/min.
Advantageous effects
The invention provides a surface roughness treatment method for front and rear shafts of a new energy automobile. Compared with the prior art, the method has the following beneficial effects:
1. the method for processing the surface roughness of the front and rear shafts of the new energy automobile comprises the steps of carrying out rough grinding processing on the annular outer surface of the transmission shaft in advance in the steps of S2 and S3, grinding the rough and rust parts of the outer surface, carrying out shot blasting processing on the annular outer surface of the transmission shaft, carrying out shot blasting strengthening, namely, under a completely controlled state, continuously jetting a medium of countless small circles called steel shots at a high speed to the surface of a part, thus generating a residual compressive stress layer on the surface, carrying out carburization strengthening processing, namely, increasing the carbon content of the surface layer of the steel part and forming a certain carbon concentration gradient, heating the steel part in a carburizing medium, preserving the heat to enable carbon atoms to permeate into the surface layer, and effectively finishing the rough grinding processing on the outer surface of the transmission shaft through shot blasting strengthening and carburization strengthening processing, the transmission shaft can be well strengthened and treated, and the working strength of the transmission shaft is enhanced.
2. This new energy automobile front and rear axle roughness treatment method, pour into appointed container through the lactic acid that the content that step S7 obtained is appointed numerical value into, drop into the transmission shaft inside the container again, adopt outside agitating unit to stir it and handle, stir for a specified duration after, take out the antimony stick, dry the back, carry out packaging process to the transmission shaft, lactic acid has better antioxidant capacity, make even the attaching to transmission shaft surface of lactic acid, the antioxidant capacity of reinforcing transmission shaft that can be better, avoid the transmission shaft to receive the oxidation once more, lead to the transmission shaft surface to rust.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides three technical solutions:
example 1
A method for processing the surface roughness of the front and rear shafts of a new energy automobile comprises the following steps:
s1, pre-cleaning treatment: preparing a cleaning pool in advance, injecting hydrochloric acid with the content controlled at 35% into the cleaning pool, placing a transmission shaft to be processed and polished into the cleaning pool, stirring the transmission shaft by adopting a stirring device with the external rotating speed set at 400r/min, cleaning and stirring for 5min, cleaning the hydrochloric acid on the outer surface of the transmission shaft by using cleaning after the cleaning and stirring are finished, and drying;
s2, rough grinding treatment: coaxially clamping one end of a transmission shaft on a power output mechanism of a lathe with an internal rotating shaft with the rotating speed set at 200r/min, roughly polishing the annular outer surface of the transmission shaft by adopting a polishing device with the internal rotating speed set at 350r/min, machining the raw material of the transmission shaft until the diameter and the length of the raw material of the transmission shaft both leave 1mm of machining allowance, then taking the transmission shaft off a clamp of the power output mechanism of the lathe, and replacing one end of the transmission shaft for machining;
s3, secondary coarse grinding treatment: grinding the end part of the shaft neck for the second time by using a grinding device with the rotating speed set at 150r/min, wherein the cutting step is the same as the step S2, the ground diameter is the diameter of the addendum circle of the spline, and the hobbing machine with the internal rotating speed set at 200r/min is used for hobbing and grinding the spline part so as to grind the spline;
s4, shot blasting treatment: placing the processed transmission shaft into a designated fixture device for clamping and fixing, and after clamping is finished, carrying out shot blasting processing on the outer surface of the transmission shaft by adopting a shot blasting machine with the external and internal rotating speed set at 350r/min, wherein the shot blasting amount is controlled within 40 Kg/min;
s5, carburizing and strengthening treatment: putting the transmission shaft into an active carburizing medium, heating the transmission shaft to a single-phase austenite region at 900 ℃, and after heat preservation is carried out for 1h, enabling active carbon atoms decomposed from the carburizing medium to permeate into the surface layer of the steel part, so that the surface of the transmission shaft obtains high carbon of the surface layer, and the core part still maintains the original components;
s6, fine grinding treatment: cooling the heat-treated transmission shaft for 30min, polishing the cooled spline shaft by using a polishing device with the internal rotating speed set at 350r/min, wherein polishing objects mainly comprise a shaft neck and a spline, so that the shaft neck and the spline meet the use requirement, and finishing the finish machining process of the spline shaft of the transmission shaft;
s7, anti-oxidation treatment: pouring the prepared lactic acid with the content controlled at 45 percent into a specified container, then putting a transmission shaft into the container, stirring the lactic acid by adopting an external stirring device with the internal stirring rotating speed controlled at 400r/min, taking out the antimony rod after stirring for a specified time, airing, and packaging the transmission shaft.
Example 2
A method for processing the surface roughness of the front and rear shafts of a new energy automobile comprises the following steps:
s1, pre-cleaning treatment: preparing a cleaning pool in advance, injecting hydrochloric acid with the content controlled at 42% into the cleaning pool, placing a transmission shaft to be processed and polished into the cleaning pool, stirring the transmission shaft by adopting a stirring device with the external rotating speed set at 450r/min, cleaning and stirring for 7min, cleaning and stirring the hydrochloric acid on the outer surface of the transmission shaft by using cleaning, and drying;
s2, rough grinding treatment: one end of a transmission shaft is coaxially clamped on a power output mechanism of a lathe with the rotating speed of an internal rotating shaft set at 300r/min, a polishing device with the internal rotating speed set at 480r/min is adopted to roughly polish the annular outer surface of the transmission shaft, the raw material of the transmission shaft is processed until the diameter and the length of the raw material of the transmission shaft both have 1mm of processing allowance, then the transmission shaft is taken down from a clamp of the power output mechanism of the lathe, and one end of the transmission shaft is replaced to carry out the same processing step;
s3, secondary coarse grinding treatment: grinding the end part of the shaft neck for the second time by using a grinding device with the rotating speed set at 200r/min, wherein the cutting step is the same as the step S2, the ground diameter is the diameter of the addendum circle of the spline, and the hobbing machine with the internal rotating speed set at 300r/min is used for hobbing and grinding the spline part so as to grind the spline;
s4, shot blasting treatment: placing the processed transmission shaft into a designated fixture device for clamping and fixing, and after clamping is finished, carrying out shot blasting processing on the outer surface of the transmission shaft by adopting a shot blasting machine with the external and internal rotating speed set at 450r/min, wherein the shot blasting amount is controlled within 45 Kg/min;
s5, carburizing and strengthening treatment: putting the transmission shaft into an active carburizing medium, heating the transmission shaft to a single-phase austenite region at 930 ℃, and after heat preservation is carried out for 1.25 hours, making active carbon atoms decomposed from the carburizing medium permeate into the surface layer of the steel part, thereby obtaining high carbon on the surface layer of the transmission shaft and keeping the original components in the core part;
s6, fine grinding treatment: cooling the heat-treated transmission shaft for 35min, setting the internal rotating speed at 470 to enable the shaft neck and the spline to meet the use requirement, and finishing the finish machining process of the spline shaft of the transmission shaft;
s7, anti-oxidation treatment: pouring the prepared lactic acid with the content controlled at 50% into a specified container, then putting a transmission shaft into the container, stirring the lactic acid by adopting an external stirring device with the internal stirring rotating speed controlled at 500r/min, taking out the antimony rod after stirring for a specified time, airing, and packaging the transmission shaft;
example 3
A method for processing the surface roughness of the front and rear shafts of a new energy automobile comprises the following steps:
s1, pre-cleaning treatment: preparing a cleaning pool in advance, injecting hydrochloric acid with the content controlled at 50% into the cleaning pool, placing a transmission shaft to be processed and polished into the cleaning pool, stirring the transmission shaft by adopting a stirring device with the external rotating speed set at 500r/min, cleaning and stirring for 10min, cleaning the hydrochloric acid on the outer surface of the transmission shaft by using cleaning after the cleaning and stirring are finished, and drying;
s2, rough grinding treatment: one end of a transmission shaft is coaxially clamped on a power output mechanism of a lathe with the rotating speed of an internal rotating shaft set at 400r/min, a polishing device with the internal rotating speed set at 600r/min is adopted to perform rough polishing on the annular outer surface of the transmission shaft, the raw material of the transmission shaft is processed until the diameter and the length of the raw material of the transmission shaft both leave 1mm of processing allowance, then the transmission shaft is taken down from a clamp of the power output mechanism of the lathe, and one end of the transmission shaft is replaced to perform the same processing step;
s3, secondary coarse grinding treatment: grinding the end part of the shaft neck for the second time by using a grinding device with the rotating speed set at 250r/min, wherein the cutting step is the same as the step S2, the ground diameter is the diameter of the addendum circle of the spline, and the hobbing machine with the internal rotating speed set at 400r/min is used for hobbing and grinding the spline part so as to grind the spline;
s4, shot blasting treatment: placing the processed transmission shaft into a designated fixture device for clamping and fixing, and after clamping is finished, carrying out shot blasting processing on the outer surface of the transmission shaft by adopting a shot blasting machine with the external and internal rotating speed set at 600r/min, wherein the shot blasting amount is controlled within 50 Kg/min;
s5, carburizing and strengthening treatment: putting the transmission shaft into an active carburizing medium, heating the transmission shaft to a single-phase austenite region at 950 ℃, and after heat preservation is carried out for 1.5 hours, making active carbon atoms decomposed from the carburizing medium permeate into the surface layer of the steel part, thereby obtaining high carbon on the surface layer of the transmission shaft and keeping the original components in the core part;
s6, fine grinding treatment: cooling the heat-treated transmission shaft for 40min, polishing the cooled spline shaft by using a polishing device with the internal rotating speed set at 600r/min, wherein polishing objects mainly comprise a shaft neck and a spline, so that the shaft neck and the spline meet the use requirement, and finishing the finish machining process of the spline shaft of the transmission shaft;
s7, anti-oxidation treatment: and pouring the prepared lactic acid with the content controlled at 55% into a specified container, then putting the transmission shaft into the container, stirring the lactic acid by adopting an external stirring device with the internal stirring rotating speed controlled at 600r/min, taking out the antimony rod after stirring for a specified time, airing, and packaging the transmission shaft.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The method for processing the surface roughness of the front shaft and the rear shaft of the new energy automobile is characterized by comprising the following steps of:
s1, pre-cleaning treatment: preparing a cleaning pool in advance, injecting a proper amount of hydrochloric acid into the cleaning pool, placing a transmission shaft to be processed and polished into the cleaning pool, stirring the transmission shaft by using an external stirring device for a specified time, cleaning and stirring, cleaning the hydrochloric acid on the outer surface of the transmission shaft by using cleaning after the cleaning and stirring are finished, and drying;
s2, rough grinding treatment: one end of a transmission shaft is coaxially clamped on a power output mechanism of a lathe, a polishing device in the lathe is adopted to perform rough polishing on the annular outer surface of the transmission shaft, the polishing is stopped when the raw material of the transmission shaft is processed to the state that the diameter and the length of the raw material of the transmission shaft both have 1mm of processing allowance, and then the transmission shaft is taken down from a clamp of the power output mechanism of the lathe and one end of the transmission shaft is replaced to perform the same processing step for processing;
s3, secondary coarse grinding treatment: grinding the end part of the shaft neck for the second time, wherein the cutting step is the same as the step S2, the ground diameter is the diameter of the addendum circle of the spline, the hobbing grinding processing is carried out on the spline part through a hobbing machine, so that the spline is ground, and the same step is carried out by taking down the transmission shaft from a clamp of a lathe power output mechanism and exchanging one end for the same processing step;
s4, shot blasting treatment: placing the processed transmission shaft into a designated fixture device for clamping and fixing, and after clamping is finished, performing shot blasting processing on the outer surface of the transmission shaft by using an external shot blasting machine, wherein the shot blasting amount is controlled in a designated interval;
s5, carburizing and strengthening treatment: putting the transmission shaft into an active carburizing medium, heating the transmission shaft to a single-phase austenite region at a specified temperature, and after the heat preservation is carried out for enough time, enabling activated carbon atoms decomposed from the carburizing medium to permeate into the surface layer of the steel part, so that the surface of the transmission shaft obtains high carbon on the surface layer, and the core part still maintains the original components;
s6, fine grinding treatment: cooling the heat-treated transmission shaft for a specified time, polishing the cooled spline shaft, wherein the polishing objects mainly comprise a shaft neck and a spline, so that the shaft neck and the spline meet the use requirements, and finishing the finish machining process of the spline shaft of the transmission shaft;
s7, anti-oxidation treatment: and pouring the prepared lactic acid with the content of a specified numerical value into a specified container, then putting the transmission shaft into the container, stirring the lactic acid by using an external stirring device for a specified time, taking out the antimony rod, airing, and packaging the transmission shaft.
2. The method for processing the surface roughness of the front axle and the rear axle of the new energy automobile according to claim 1, characterized by comprising the following steps: the content of the hydrochloric acid in the step S1 is controlled within the range of 35-50%, the internal rotation speed of the stirring device is set at 400-500r/min, and the specified time duration is controlled at 5-10 min.
3. The method for processing the surface roughness of the front axle and the rear axle of the new energy automobile according to claim 1, characterized by comprising the following steps: in the step S2, the internal rotation speed of the grinding device is set at 600r/min 350-.
4. The method for processing the surface roughness of the front axle and the rear axle of the new energy automobile according to claim 1, characterized by comprising the following steps: in the step S3, the rotation speed of the grinding device is set at 250r/min and the rotation speed of the gear hobbing machine is set at 400r/min and 200-.
5. The method for processing the surface roughness of the front axle and the rear axle of the new energy automobile according to claim 1, characterized by comprising the following steps: in the step S4, the internal rotation speed of the shot blasting machine is set at 350-600r/min, and the shot blasting amount of the shot blasting machine is controlled at 40-50 Kg/min.
6. The method for processing the surface roughness of the front axle and the rear axle of the new energy automobile according to claim 1, characterized by comprising the following steps: the specified temperature in the step S5 is controlled at 900 ℃ and 950 ℃, and the temperature is kept for 1-1.5 h.
7. The method for processing the surface roughness of the front axle and the rear axle of the new energy automobile according to claim 1, characterized by comprising the following steps: in the step S6, the internal rotation speed of the grinding device is set at 600r/min and the cooling time is controlled at 30-40 min.
8. The method for processing the surface roughness of the front axle and the rear axle of the new energy automobile according to claim 1, characterized by comprising the following steps: in the step S7, the content of lactic acid is controlled to be 45-55%, and the stirring speed in the stirring device is controlled to be 600 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010929402.5A CN112296764A (en) | 2020-09-07 | 2020-09-07 | Surface roughness treatment method for front and rear shafts of new energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010929402.5A CN112296764A (en) | 2020-09-07 | 2020-09-07 | Surface roughness treatment method for front and rear shafts of new energy automobile |
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| CN112296764A true CN112296764A (en) | 2021-02-02 |
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| CN202010929402.5A Pending CN112296764A (en) | 2020-09-07 | 2020-09-07 | Surface roughness treatment method for front and rear shafts of new energy automobile |
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| CN115502674A (en) * | 2022-11-03 | 2022-12-23 | 苏州耀玮彤机械有限公司 | Surface milling method for transmission shaft of automobile steering wheel |
| CN115928081A (en) * | 2022-12-06 | 2023-04-07 | 恩格尔注塑机械（常州）有限公司 | Surface composite strengthening processing method for injection molding machine pull rod |
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Application publication date: 20210202 |